Dual control system



July l0, 1956 P. MosTi-:K 2,754,432

DUAL CONTROL SYSTEM Filed April 30, 1954 l C i lLocouor/VE p I I Iyli2ND.

LL ocoMor/vf I I /08 Peler Mosfet INVENTOR.

aan/#W Elan-xanax DUAL CONTROL SYSTEM Peter Mustek, Independence, OhioAppiication April 30, 1954, Serial No. 426,628

1 Claim. (Cl. 307-140) This invention relates to electrical controlsystems and has for its primary object the provision of electricalcircuits capable of being utilized to control two separate loads totallyindependent of each other utilizing only one pair of conductors.

A further object of this invention resides in the provision of a dualcontrol system for use in separately and independently operating twoload devices, such as electric trains, while utilizing only a pair ofconductors such as exemplified by the tracks on which the trains ride tocomplete the operative electrical circuits.

rEhe invention is especially adapted for use in conjunction with toy orminiature trains so that the speed of two independent trains travelingon a single track can be separateiy controlled and varied.

Still further objects and features of this invention reside in theprovision of a dual control system which is simple in its components,composed of readily available parts, which may be used in conjunctionwith various existing types of equipment, and which is comparativelyinexpensive thereby permitting the wide use and distribution.

These, together with the various ancillary objects and features or theinvention which will become apparent as the following descriptionproceeds, are attained by this dual control system, various embodimentsof which have been illustrated in the accompanying drawings, by way ofexample only, wherein:

Figure l is a circuit diagram of an embodiment of the inventionespecially adapted for use in controlling toy electric trains;

Figure 2 is a schematic diagram illustrating the principics of theinvention which is adapted for use in conjunction with electric trainsand which utilizes a pair of transformers; and

Figure 3 is a circuit diagram of an arrangement for turning two loaddevices on or off such as two electric iainps, or the like.

With continuing reference to the accompanying drawings wherein likereference numerals designate similar parts throughout the various views,and with initial attention directed to the embodiment of the invention,as is shown in Figure 1, it will be noted that this dual control systemis especially adapted for use in conjunction with ciectric trains whichare adapted to ride on track formed from a middle rail 12 which isinsulated from the outside rails 14. The dual control system is adaptedto control two independent electric trains operated by locomotives shownschematically at 16 and 18.

The dual control system is adapted to be connected to the source ofalternating current as at 20 which is connected to the primary coil 22of a transformer generally indicated at 24 having a secondary coil 26provided with a pair of pick-up slides 28 and 30 forwardly mountedthereon.

Connected to the slides 28 and 30 are rectifiers 32 and 34 which are ofopposite polarity. The rectiers 32 and 34 are both connected toconductor 36 which, in turn, is connected to the middle rail 12.Connected to the midnited States Patent O 2,754,432 Patented July 10,1956 r. ICC

dle rail 12 are receiving rectifiers 38 and 40 which are of the samepolarity as the rectiers 32 and 34, respectively, and which areconnected to the motors 44 and 46 of the locomotives 16 and 18. Themotors are connected through conductors 4S and 50 to the outer rails 14which are in effect but a single conductor. Condensers 52 and 54 areconnected to the rectiers 38 and 40 in parallel with the motors 44 and46.

inasmuch as the voltage picked up from the transformer secondary 26 bythe slides 28 and 30 will be transmitted by the transmitting rectiers 32and 34 as only the positive half and the negative half respectively ofthe sign wave form of electrical impulse, the motors 44 and 46 will beenergized by these rectied impulses. This arrangement in view of therespective polarities of the transmitting and receiving rectifiers, willnot allow feed back from the respective load devices 16 and 18. In orderto supply a continuous and substantially four way form of power to themotors 44 and 46, it will be seen that the Condensers 52 and S4 storepower when the receiving rectitiers 33 and 4t) permit the transmissionof power and when they prevent the other half wave of power from beingdelivered to the motors 44 and 46, the Condensers and 54 will thendischarge.

Referring now to the embodiment of Figure 2, it will be noted thatherein two separate transformers 60 and 62 are energized by thealternating current supply 64. Connected to the secondaries of thetransformers by means of any convenient means, are the transmittingrectiers 66 and 68 which are connected to a single conductor 70.Connected to the conductors 70 are the load devices 72 and 74 andCondensers 76 and 7o are effectively arranged so as to be in parallelconnection with the respective load devices 72 and 74- so that whencurrent is permitted t0 ow through the receiving rectifiers and 82 thecondensers 76 and 78 will become charged so as to be able to delivertheir stored energy to the load devices 72 and 74 when the respectiverectiers do not permit passage of electrical energy. The single line 84interconnects the load devices with the secondaries of the transformers60 and 62 to complete the operative electrical circuits.

In the embodiment of the invention as is shown in Figure 3, notransformers are utilized but switches and 92 interconnect the dualcontrol system with the source of alternating current. Transmittingrectiiiers 94 and 96 are connected through the switches 9() and 92 tothe source of alternating current and are connected by means of a singleconductor 98 to the receiving rectiers 100 and 102. The load devices 194and i are connected to the rectiiers 100 and 162 and to the supply line10S. Condensers 110 and 112 are connected in parallel connection withthe loads 104 and 106 so that the Condensers Will become charged whenthe rectifiers 1613 and 102 are transmitting electrical power so as toassure a substantially rectified full wave of power to the load devices104 and 106.

From the foregoing, it can be readily understood that utilizing eitherthe slides 2S; and 39, the transformers 6l? and 62, or the switches 9i?and 92 in the various forms of the invention, control of either one oftwo load devices or control of both of the load devices at the same timecan be achieved. Further, since from the foregoing the construction andadvantages of this invention can be readily understood, furtherdescription is believed to be unnecessary.

However, since numerous modifications will readily occur to thoseskilled in the art, after a consideration of the foregoing specificationand accompanying drawings, it is not intended to limit the invention tothe precise embodiments shown and described, but all suitablemodifications and equivalents may be readily resorted to which fallwithin the scope of the appended claim.

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What is claimed as new is as follows:

A control system for supplying variable amounts of electrical power to afirst load device and a second load device comprising a source ofalternating current, a transformer having a primary coil connected tosaid source of alternating current, said transformer having a secondarycoil provided with a pair of pickup slides movably mounted thereon forconnecting said secondary coil to said load devices to supply variableamounts of electrical power to said load devices, a iirst transmittingrectiiier and a second transmitting rectifier each connected to one ofsaid slides, said transmitting rectiliers being of opposite polarity andbeing connected to a single conductor, a first receiving rectifier and asecond receiving rectiiier connected to said single conductor, saidiirst receiving rectifier being connected to said first load device,said second receiving rectifier being connected to said second loaddevice, and condensers connected to said receiving rectiiiers inparallel connection with said load devices, said condensers beingcharged when said receiving rectiliers pass current to said loaddevices, said condensers discharging to provide power to said loaddevices when said receiving rectiiiers prevent passage of current tosaid load devices.

References Cited in the file of this patent UNITED STATES PATENTS1,778,465 Ozanne Oct. 14, 1930

